34Then the priest is to take some of the blood of the sin offering with his finger, put it on the horns of the altar of burnt offering, and pour out the rest of its blood at the base of the altar.
35And he shall remove all the fat, just as the fat of the lamb is removed from the peace offerings, and he shall burn it on the altar along with the offerings made by fire to the LORD. In this way the priest will make atonement for him for the sin he has committed, and he will be forgiven.
— Leviticus 4:34-35